package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;

    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult page(SetmealPageQueryDTO setmealPageQueryDTO){
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());

        Page<SetmealVO> page = setmealMapper.page(setmealPageQueryDTO);

        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 新增套餐
     * @param setmealDTO
     * @return
     */
    @Transactional
    @Override
    public void save(SetmealDTO setmealDTO){
        Setmeal setmeal = Setmeal.builder()
                .categoryId(setmealDTO.getCategoryId())
                .name(setmealDTO.getName())
                .price(setmealDTO.getPrice())
                .status(setmealDTO.getStatus())
                .description(setmealDTO.getDescription())
                .image(setmealDTO.getImage())
                .build();

        setmealMapper.insert(setmeal);

        Long id = setmeal.getId();

        List<SetmealDish> setmealDishs = setmealDTO.getSetmealDishes();

        if(setmealDishs!=null&&!setmealDishs.isEmpty()){
            setmealDishs.forEach(setmealDish1 -> setmealDish1.setSetmealId(id));
            setmealDishMapper.insert(setmealDishs);
        }
    }

    /**
     * 根据ID获取套餐
     * @param id
     * @return
     */
    @Transactional
    @Override
    public SetmealVO getById(Long id){
        Setmeal setmeal = setmealMapper.getById(id);
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);

        List<SetmealDish> setmealDishs = setmealDishMapper.getBySetmealId(id);

        setmealVO.setSetmealDishes(setmealDishs);

        return setmealVO;
    }

    /**
     * 修改套餐
     * @param setmealDTO
     * @return
     */
    @Transactional
    @Override
    public void update(SetmealDTO setmealDTO){
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);

        setmealMapper.update(setmeal);

        setmealDishMapper.deleteBySetmealId(setmeal.getId());

        List<SetmealDish> setmealDishs = setmealDTO.getSetmealDishes();
        if(setmealDishs!=null&&!setmealDishs.isEmpty()){
            setmealDishs.forEach(setmealDish1 -> setmealDish1.setSetmealId(setmeal.getId()));
            setmealDishMapper.insert(setmealDishs);
        }

    }


    /**
     * 启用停售套餐
     * @param status
     * @param id
     * @return
     */
    @Override
    public void updateStatus(Integer status, Long id){
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
        if(status == StatusConstant.ENABLE){
            //select a.* from dish a left join setmeal_dish b on a.id = b.dish_id where b.setmeal_id = ?
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if(dishList != null && dishList.size() > 0){
                dishList.forEach(dish -> {
                    if(StatusConstant.DISABLE == dish.getStatus()){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }

        Setmeal setmeal = new Setmeal();
        setmeal.setStatus(status);
        setmeal.setId(id);

        setmealMapper.update(setmeal);
    }

    /**
     * 批量删除套餐
     * @param ids
     * @return
     */
    @Transactional
    @Override
    public void delete(List<Long> ids){
        for(Long id:ids){
            Setmeal setmeal = setmealMapper.getById(id);
            if(setmeal.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }

        setmealMapper.delete(ids);
        setmealDishMapper.delete(ids);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
